Plaited crepe forming mechanism



AWN mi, 194W w. H. CANNARD PLAITED CREPE IORMING MEHANISM 2 Sheets-Sheet 1 Filed Oct. 20, 1936 April 16, 1940..

W. H. CANNARD PLAITED CREPE FORMING MECHANISM Filed Oct. 20, 1936 2 Sheets-Sheet 2 Patented Apr. 16', 1940 UNITED STATES VPATsN'i ori-'ics 17 Claims.

This invention relates to the art of creping paper and like material Iby forming corrugations therein and then setting the corrugations into more or less attened crinkles, and involves a i special corrugation pressing unit and the manner ol combining the same with the corrugating mechanism.

One object of the invention is to provide special mechanism adapted to produce certain unusual l crinkle effects in the material. A further object of the invention is to provide pressing means which can be controlled and changed to produce in corrugated material a variety of crinkle effects oi different form and appearance. M In various prior creping machines press, or ironing rolls have frequently been disposed at the outlet end of the corrugating mechanism to crush the corrugations of the material into fiat longitudinal plaits, and such rolls have been normally made adjustable so that the amount of pressure could be regulated. By controlling the depth of thecorrugations formed and the amount of pressure exerted by the press rolls, the extent of flattening and crinkling of thelmaterial can be varied. Under different adjustments, however, the effects produced varied from each other only in degree. By the present invention I am able to vary not only the degree of setting of the material corrugations, but also to produce crinac kling eiiects unobtainable with the priormachines and through the same special mechanism obtain effects which differ from each other both in form and appearance rather than merely in degree.

I have discovered that if, prior to setting the corrugations by passing between coacting press rolls, the material be subjected to a pressing action from one side only, the form and arrangement of corrugations may be changed. I have further discovered that if, prior to the usual pressing operation, the material be bent transversely of the direction of the corrugations by being conducted through a curvilinear path, the

corrugations will be in a measure upset and distorted so as to result in a rather peculiar crinkled formation when passed through the press rolls.

The various effects obtained will be dependent in part upon the particular form, and coarseness 01 neness, of the corrugations initially produced and theextent of pressure exerted in the final pressing operation, but the above operating principles may be applied under any given set of conditions to produce the desired effects in the formation of the crinkles. Thus, for ne corrugations the preliminary pressing from one side and the degree of bending of the material to obtain a particular eiect will be greater than in the case of coarsely corrugated material. Also, the nal crinkle effect will in any case vary in intensity depending upon the extent of the press- 5 ing action exerted in the nal pressing operation.

The general method, according to the principles of which the machine of the present invention operates, and certain products thereof 1 are more fully described and claimed in my copending application Serial No. 106,684, led 0ctober 20, 1936.

The nature of the present invention may be understood by reference to the embodiment w thereof as shown in the accompanying drawings now to be described.

In such drawings:

Fig. 1 is a top plan fragmentary View of a corrugating, machine incorporating the present in- Il vention;

Fig. 2 is a longitudinal section corresponding to Fig. 1;

Fig. 3 is a view similar to Fig. 2 but showing a slightly different arrangement of operative 6 parts:

Figs. 4 and 5 are diagrammatic views illustrating the principles of operation of the invention;

Fig. 6 is a plan view of one form of product 30 obtained with the invention, and Fig. 7 a corresponding end view;

Fig. 8 is a plan View of another formof product which can be obtained and Fig. 9 a corresponding end View; 35

Fig. 10 is a plan View of a still furthe: form of product which can be obtained, and Fig. 11 a corresponding end view.

In the embodiment of the invention ii .istrated the corrugating machine with which the inven- 40 tion is employed is similar to that shown in my' copending application lSerial No. 106,683, led October 20, 1936. Such machine includes lower and upper frame members i and 2 adjustably supported in spaced relation by adjustable stand- 45 ards 3 which enable the operative relation of the corrugating elements to be varied to increase or decrease the depth of corrugation formed. Sets of upper and lower belts are arranged to carry the material from the entrance end of the ma- 50 chine, and to support the belts a series oi' upper shafts I are journaled in the upper frame 3 at suitable longitudinal points. Such shafts have secured thereto an arrangement of spaced apart shives 5 which carry the operating belts 6. A Il.

similar arrangement of shafts 1 is provided in the lower frame upon which are mounted shives 8 which carry the lower set of belts 9. The lower beltswillbearrangedasshowninFIg.2tobe aligned with the spaces between the upper belts, and the upper and lower sets will run in somewhat the same plane as it is desirable that corrugations be formed by the belts as they carry the material through the machine. Beyond the set ,of shives illustrated, which define the point where the material will be discharged from the belts, is arranged a shaft I0 in the upper frame upon which is mounted a corrugated roll II. Immediately below, a shaft I2 journaled in the lower frame carries a coacting corrugated roll I3. Such rolls serve to produce additional corrugations in theA material as the same passes between the rolls. By adjusting the standards 3, the operative relation of the sets of belts E, l, and the corrugating rolls II, I3 may be set to produce corrugations in the web of the material lf3 of the desired depth. The particular rolls illustrated are, it will be observed, of such' designas to produce relatively fine corrugations, such corrugations being substantially more numerous and smaller than the corrugations previously produced by the traveling belts. So far, however, as the invention is concerned, the corrugating `instrumentalities may take an entirely different ing mechanism comprises a pair of coacting rolls I9 and 2| respectively supportedon shafts I8 and 20. According to the invention the rolls are arranged so that the corrugated web passes onto one of the rolls and travels a portion of the way around its periphery before coming into the crushing area between the two rolls. v Thus,

referring to Fig. 2, the lower pressing ron Is tekes up the corrugated web after it leaves the corrugating rolls I I and I3, and the web travels around the periphery of roll I9 before being pressed by the roll 2|.

Preferably roll I9 will be positioned in oset relation to the path of travel of the web between the corrugating rolls, and the roll I9 may be arranged in rolling contact with the upper cor-- rugating roll I I. The web after being corrugated between rolls II and I3 will pass upwardly to the point of contactbetween rolls II and I9 and there be taken up by'roll I9. Such arrangement is calculated to operate satisfactorily under high speed production without tea-ring of the web, or any undesired spreading of the corrugations such as may occur where pressing means is disposed in spaced relation to the corrugating mechanism.

The lower pressing roll I9 under which the web passes will normally be a smooth surfaced pressing roll. Where it is intended merely to crush the corrugations into ilat plaits, the upper pressing roll 2l will also have a smooth surface as in the embodiment of Figs. l and 2. Where it is desired to press the corrugations only in predetermined areas, the uppermost pressing roll may be formed with a suitable surface design. It will be understood, however, that certain novel effects involving reformation of the character of the web corrugations4 are obtained according to the invention, because of the particular arrangement of. the coacting pressing rolls in relation to the corrugating mechanism, which do not depend on ,the surface character of the pressing roll.

The coacting pressing rolls may be supported in the frame of the corrugating'machine by means of a mounting comprisinga pair of arms I6 supported in brackets I5 secured to the sides of the upper frame 3. As shown in Fig. 2, the arms I6 are longitudinally slotted toAprovide a guideway in which are journaled the ends of shafts I8 and 20 which carry the respective rolls I9 and 2l. Suitable arrangement will be made to adjust the pressure between the rolls.

In order to obtain certain variations in the effect of the pressing mechanism on the corrugated web, it is desirable that the mounting be adjustable so that the web after leaving the corrugating mechanism may be caused to travel a greater or a lesser distance about the periphery of the first pressing roll before being crushed between the,two pressing rolls. Accordingly, the mounting arm I6 may be pivotally supported on bosses 33 in the frame brackets I5, set screws Il being provided engageable with the bosses to secure the frame members in any adjusted position. The axis about which the frame members pivot as determined by the bosses 33 will preferably coincide with the shaft IB of the lower roll I9 so that the position of the upper roll 2| may be swung around an arc to change the point of contact between the rolls 2l andl I9 without disturbing the position of the lower pressing roll I9 in its relation to the corrugating roll II. With such an arrangement, adjustment of the mounting I6 will serve to change the position of the crushing bight between rolls 2I and I9 "in relation to the point where the web is taken onto the roll pressing rollfl9 from the corrugating roll II. In Fig. 2 one adiusted position of the mounting is shown' in full line and a further adjusted position is shown' in broken line. In the dotted line position the web travels only a short distance around the periphery of the roll I9 before being engaged by roll 2|.'

In Figs. 6 and '7 I have shown a corrugating web after being crushed with the present pressing mechanism. Such product is substantially similar to a web as pressed with a more ,or less conventional arrangement of pressing mechanism. To obtain this product the pressing rolls are disposed in relation to the pressing mechanism substantially as represented by the dotted lines showing in Fig. 2. Such arrangement is diagrammatically illustrated in Fig. 5 wherein it will be noted, that the corrugated web is taken up on the lower pressing roll I9 at point C, and travels only a short distance around the periphery of the roll I9 before being pressed at point D between rolls I9 and 2 I.

A further product of the mechanism of Fig. 2 is illustrated in Figs. 8 and 9. In the product of Figs. 6 and 7 it will be noted that the upper and lower corrugations a-I, b-I are more or less-uniform in width. By increasing the extent of traverse of the corrugated web around the lower pressing roll I9 under an arrangement of the rolls as diagrammatically shown in Fig. 4, the corrugations of the web undergo a change. Assuming that the pressing rolls I9 and 2| are power driven, it will be evident that the web is drawn tightly against the lower roll I9 during passage thereover so that the roll I9 exerts a pressing action against the web from one side.

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'The corrugations b-Z on the side o! the web engaged by the roll are therefore flattened out to some extent, while the width of the corrugations a2 on the other side are correspondingly diminished in width. 'I'he change effected by the pressing action of the single roll I9 is best Shown in Fig. 9 and may be understood by a comparison of Fig. 9 with Fig. '1. The web, after having the arrangement of its corrugations changed as just explained during traverse between the points A and B in Fig. 4, will then be pressed between rolls I9 and 2l at point B. The product as shown in Figs. 8 and 9 will be obtained by using only a light pressure between the rolls, but it will be understood that the co1'- rugations may be substantially attened by increasing the pressure.

A further product obtainable under the invention is illustrated in Figs. 10 and 11. In traveling about the roll I9 the web is bent transversely to the corrugations. Where such bending action exceeds a certain minimum in relation to the depth of the corrugations, the corrugations tend to buckle at recurrent points, and when pressed. while in its bent condition the web will emerge with the herringbone or arrowhead configuration of the corrugations as illustrated in Figs. 10 and 1l.

As in the case of the product shown in Figs. 8 and 9, the corrugations b3 of the product of Figs. 10 and l1, which face the lower pressing roll it, will -be attened out to some` extent during traverse about such lroll and as explained the corrugations will also be distorted or broken transversely at recurrent points because of the arcuate path through which the web travels about such roll.

As more fully explained in my copending application Serial No. 106,684, flled October 20, 1936, in which the product of Fig. 10 and its manner of production are specifically claimed, thedegree of distortion of the corrugations in the herringbone design will depend upon the degree to which the corrugated material is bent. Where the corrugations are relatively deep, which may be determined by adjustment of the corrugating mechanism, it may be necessary to bend the web only to a relatively small extent. Thus, the mechanism as shown in the embodiment of Fig. 2 may dit dit

be employed to produce the herringbone effect in such instances. If the corrugations produced in the web are relatively shallow, a greater degree of bending may be necessary to obtain the herringbone effect. To obtain a greater bending action under the latter circumstances it may be necessary to substitute a smaller lower pressing roll 29, as shown in Fig. 3, for the pressing roll I 9 of the embodiment of Fig. 2. I may say that for relatively ne corrugations, it may be. desirable to use a lower smooth surfaced pressing roll of4 an inch and a half or less diameter, and wherever it is desired to obtain a product such as shown in Fig. l0 a small size lower pressing roll is desirable whether the web be either coarsely or finely corrugated. The success of the present mechanism in obtaining the herringbone effect will in part be determined by the extent, as well as by the size of the arc through which the web is bent. Thus, it is desirable to have the web travel a substantial distance around the lower press roll before being ironed between the two press rolls. For this purpose the adjustable mounting may be swung so that the point of contact between the pressing rolls is substantially removed from the point where the lower pressing rollA takes up the web from the corrugating mechanism.

In order to maintain the coactive relation between the two pressing rollsvand the rolling contact between the lower pressing roll and the upper corrugating roll, and particularly to permit regulation, the moimting arms heretofore described may be constructed as shown in Figs. 1 and 2. Supporting the journal 3d of the lower pressing roll I9 is an adjustment screw 35 screwthreaded into the lower end of arm I6 so that it may be raised and lowered to change the relation of the lower pressing roll to the corrugating roll II. By adjustment of the screw the roll may be raised and lowered in the mounting. The journal 36 of the upper pressing roll 2| may be maintained under pressure through a spring 31 engageable with its upper side, the tension of which may be regulated by an adjustment screw 33 threaded into the upper end of arm I6. By adjustment of screw 38 the degree of pressure exerted on the corrugated material through the coacting rolls may be increased or diminished. In certain instances, for example, when producing a product such as illustrated in Figs. 8 and 9, it may also be desirable to provide for a certain amount of spacing between the upper and lower pressing rolls so that the corrugations will be only partially flattened. An adjustable stop may be provided between the journals 34 and 36 of the two rolls. Such a stop is indicated at 39. the same comprising a screw member threaded into the upper side of the journal 34 of the lower roll and bearing against the under side of the journal 36 of the upper roll. It Willbe evident that such a device enables the rolls to be adjustably spaced, while through the spring 31 and adjustment screw 33 the amount of pressure of the upper roll against the web may be independently regulated.

In the various embodiments of the invention described, it is contemplated that the upper and lower pressing rolls be power driven. As shown in Fig. 1, coacting gears 22 and 23 m'ay be secured to the shafts of the respective rolls. Where. the mounting for the rolls is to be adjustable, it is most convenient to obtain the drive for the rolls from a gear 2li on the power driven corrugating roll Il.

While I have illustrated the application of my pressing mechanism to a particular form of corrugating means comprising corrugating rolls II and I3, it will be understood that the invention may be equally well applied to other types of corrugating mechanism merely by properly positioning the coacting pressing rolls in relation to the path of travel of the web from the corrugating means so that the web travels about one of the pressing rolls before being pressed between the rolls. Thus, referring to Figs. 1 and 2, it will be understood that the pressing mechanism may be used in a corrugating machine comprising belt corrugating instrumentalities in lieu of fiuted corrugating rolls. Thus, the mounting may be supported in the frame so that the lower pressing roll is in rolling contact with the upper series of corrugating belts 6 at the point where they pass over the shives 5. Again, it is immaterial whether the pressing rolls be oiset either upwardly or downwardly with respect to the path of travel of the web, and may therefore be equally well associated with the lower corrugating mechanism instead of with the upper corrugating mechanism.

From the sample products herein shown and the illustrative drawings it will be understood that I have provided a simple form of pressing Kilt soy

mechanism which is capable of obtaining particular effects in the corrugated web incident to the pressing action. Also, it will be seen that by providing for adjustment of the relative position of the coacting pressing rolls in relation to the path of travel of the corrugated web, the eiects obtained may be varied. The mechanism is so simple that various forms of pressing rolls may be readily substituted at any time. In some instances two smooth surfaced rolls will be employed, while for certain work rolls having an impression surface may be substituted.

The apparatus of the invention while simple is capable of a reasonable degree of modication and equivalency and the scope of my invention is therefore to be determined according to the appended claims.

I claim:

l. In a corrugating machine, coacting peripherally corrugated rolls adapted to form increased longitudinal corrugations in a web of material passing through the machine, a pair of opposing press rolls, the corrugated rolls delivering the corrugated web to the press rolls without pressing of the web corrugations at the point of delivery, a mounting supporting said press rolls at the outlet end of said corrugating means with their bight oiset from the path of travel of the web through the corrugated rolls so that the web corrugations are pressed only after passage around a portion of the press rolls.

2. In a web corrugating machine, means feeding a longitudinally corrugated and longitudinally uncreased web, a pair of opposing press rolls receiving the web from the feed means while the web is in corrugated condition and coacting to press the corrugated web, one of said rolls being interposed between the web feeding means and the position of the other press roll so that the web is caused to travel about the periphery of the interposed roll before passing between the two rolls.

3. In a web corrugating machine a roll carrying a series of peripherally extending web corrugating elements adapted to form uncreased longitudinal -web corrugations, a take-o' roll opposing said first roll and receiving the web therefrom while in corrugated form, and a press I roll opposing the take-orf roll and coactive therewith to flatten the corrugations of the web received from the first roll.

4. In a web corrugating machine opposing forming means adapted to produce uncreased longitudinal corrugations in a web passed therebetween, a press roll positioned at the outlet end of the forming means in offset relation to the path of travel of the web through the forming means and around which the web is fed without preliminary flattening of the web corrugations, and a second press roll coacting With the first press roll to press the web as it travels about the first roll.

5. In a web corrugating machine a pair of coacting corrugating rolls adapted to produce uncreased longitudinal corrugations in a web, and a pair of coacting press rolls positioned at the discharge end of the corrugating rolls adapted to receive the web from the corrugating rolls while in corrugated unilattened form and adapted to press down the web corrugations therebetween, said press rolls being positioned to one side of the path of travel of the web through the corrugating rolls so that the web is caused to travel a tortuous course while in corrugated form before passing between saidpress rolls.

6.' In a web corrugating machine, a pair of corrugated rolls adapted to produce uncreased `longitudinal corrugations in a web, a press roll opposing. one of said corrugated rolls andadapted to take olf the web therefrom at a point peripherally offset from the point of coaction of said corrugating roll with the other corrugating roll without flattening of the web corrugations at the take-olf point, and a second press roll op'- posing the first press roll at a point peripherally spaced from the position of the pair of corrugating rolls.

7. In a web corrugating machine, coacting up- Der and lower corrugating rolls adapted to produce uncreased longitudinal corrugations in a web, and a pair of coacting press rolls, the first of said press rolls opposing the side of one of the corrugating rolls and receiving the web in corrugated condition from a point on the periphery of said corrugating roll removed from the contact point between the two corrugating rolls, the second press roll opposing the rst press roll beyond the point of opposition of the first press roll to said corrugating roll.

8. In a corrugating machine a roll carrying a series of peripherally extending web corrugating elements adapted to produce uncreased longitudinal corrugations in a web, a second, smooth surfaced roll in rolling contact with the web corrugating elements of said rst roll and receiving the web therefrom in corrugated condition, and a roll coactive with said second roll to crush the web corrugations at a point on the second rollperipherally spaced from the point of contact of the second roll With the rst roll.

9. In a corrugating machine, a corrugated roll for feeding a web in longitudinally corrugated and longitudinally uncreased form from the machine, a press roll of small diameter opposing said corrugated roll and receiving the web therefrom in corrugated condition, and a second press roll opposing the first press roll at a point on its periphery beyond the position of the corrugated roll.

10. In a web corrugating machine, means delivering a corrugated web, a pair of coacting opposing press rolls between which .the web is fed from the delivery means, and means for adjustably tilting said rolls in the machine, one in rela.- tion to the other, about an axis transverse to the web to adjust the direction of travel of the web as it passes between the rolls in relation to the direction of web travel at the web delivery means.

11. In a corrugating machine, a pair of opposing press rolls for ironing the corrugations of a web of material passed through the machine, and means adjustably supporting one of said press rolls to permit said roll to swing about the periphery of its coacting press roll.

l2. In a corrugating machine, a press roll at the outlet end of the corrugating mechanism over which the web is fed, a second roll coactive with the rst roll to press the web corrugations, and a mounting supporting the second roll to be ad- ,justably moved bodily to positions opposite diier- 14. In a corrugating machine, means for corrugating a web traveling through .the machine, a coacting pair of opposing web press rolls at the outlet end of the corrugating means, and a press roll mounting adjustable to different positions in relation to the corrugating means to shift the position of the pressing point of the press rolls in relation to the direction of travel of the web through the corrugating means.

15. In or for a web corrugating machine, `a pair of opposing press rolls, an adjustable frame supporting both said rolls, a support pivotally supporting the frame, pivotedat the axis of one of said rolls, said frame being movable about its pivot to swing the second roll to positions opposite diierent points on the periphery of the first roll.

16. In a corrugating machine; a coasting pair of opposing press rolls adapted to press the corrugations in the web traveling through the machine, an adjustable supporting frame for the pair of rolls pivotally supported in the machine for swinging movement to adjustably tilt the rolls one in relation to the other about an axis transverse to the direction of travel o! the web to said rolls, and means operative to drive said rolls in any adjusted position of the mounting.

17. In a corrugating machine, a press roll, feed means delivering to the press roll, without pressing a longitudinally corrugated web for passage around the press roll preliminary to flattening of the web corrugations, and a second press roll opposing the rst press roll at a point on the periphery of the latter removed from the position of the feed means and coacting with the first press roll to effect flattening of the web corrugations.

WILLIAM H. CANNARD. 

